Magnetic Sheet

ABSTRACT

The invention discloses a magnetic sheet, comprising: a frame structure, a plurality of magnetic structures are arranged on the periphery of the frame structure, the frame structure and the plurality of magnetic structures are integrally formed; wherein each of the plurality of magnetic structures comprises: a steel pipe, a magnet arranged in the steel pipe and plugs at both ends of the steel pipe. Through the magnetic structures which are integrated with the frame structure, after the magnetic sheet is used for a long time, the magnetic structures still can be attached to a magnetic sheet body, and the problems that the magnetic structures are damaged and fall off are avoided.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application is a national phase of Ser. No.PCT/CN2018/109638 filed Oct. 10, 2018, the entire contents of which areincorporated herein by reference, and which claims priority to and thebenefit of Chinese Patent Application No. 201811116957.7 filed Sep. 25,2018.

BACKGROUND OF THE INVENTION 1. Field of the Invention

The invention relates to the technical field of toys and teaching aids,and more particularly, to a magnetic sheet.

2. Description of the Related Art

Magnetic sheets are one of the favorite toys for kids. The existingmagnetic sheet often takes various shapes, for example, square,rectangle, triangle, circular, polygon, The magnetic sheet mainlycomprises a magnetic sheet body and a plurality of magnetic clampingparts. The plurality of magnetic clamping parts have magnets therein andare clamped to the periphery of the magnetic sheet body, allowing theperiphery of the magnetic sheet body to become magnetic. Such anarrangement enables the periphery of the magnetic sheet body to betemporarily connected to or fixed to peripheries of other magneticsheets by magnetic force. Since the magnetic sheets have the pluralityof magnetic clamping parts therein, they may stick together on everyside, and kids may create a variety of shapes by using several pieces ofmagnetic sheets having various shapes, thus sparking imagination inchildren of all ages.

The plurality of magnetic clamping parts in the present magnetic sheetare fixed to the magnetic sheet body by clamping or with glue, or theyare pressed against the magnetic sheet body by a machine. Of note, aproblem with such an arrangement is that the plurality of magneticclamping parts may be damaged or they may fall off.

SUMMARY OF THE INVENTION

In order to solve the above-mentions problems in the prior art, thepresent invention aims to provide a magnetic sheet.

To this end, detailed technical solution adopted in the presentinvention is as follows:

A magnetic sheet, comprising: a frame structure, a plurality of magneticstructures being arranged on the periphery of the frame structure, theframe structure and the plurality of magnetic structures beingintegrally formed; wherein each of the plurality of magnetic structurescomprises: a steel pipe, a mag et arranged in the steel pipe and plugsat both ends of the steel pipe.

In the above-mentioned the magnetic sheet, wherein a plurality ofthrough holes are provided in the frame structure, the frame structurecomprises: an annular outer frame, an annular inner frame disposed inthe outer frame, and a connecting part for connecting the outer frameand the inner frame, wherein the plurality of magnetic structures arearranged in the outer frame.

In the above-mentioned the magnetic sheet, wherein the frame structurefurther comprises: a plurality of reinforcing ribs disposed on theconnecting part, two ends of each of the plurality of reinforcing ribsare connected to the outer frame and the inner frame, respectively, anda first groove is formed between two adjacent reinforcing ribs.

In the above-mentioned the magnetic sheet, wherein a second groove isformed at a side of the outerframe which is close to the inner frame,and two second grooves are formed at two ends of each of the pluralityof magnetic structures.

In the above-mentioned the magnetic sheet, wherein the plugs are of anintegrated structure, the plugs comprise the following parts insequence: a cylindrical plugging part, plugged into the steel pipe; acircular-truncated-cone-shaped sealing part for sealing the steel pipe;and a cylindrical connecting part, connected to the frame structure.

In the above-mentioned the magnetic sheet, wherein the plugging part hasan outer diameter greater than an outer diameter of the connecting part;a larger bottom surface of the sealing part has an outer diametergreater than the outer diameter of the plugging part, and a smallerbottom surface of the sealing part has an outer diameter less than theouter diameter of the connecting part.

In the above-mentioned the magnetic sheet, wherein the plurality ofthrough holes are formed in a thickness direction of the frame structureand are evenly distributed along a periphery of the frame structure.

The above-mentioned the magnetic sheet further comprises: a. pluralityof mushroom pins that are fitted with the plurality of through holes.

The above-mentioned the magnetic sheet further comprises: a luminoussystem, disposed in the frame structure.

In the above-mentioned the magnetic sheet, wherein the luminous systemcomprises: a luminous element, a controller for driving the luminouselement, and a power supply for powering the luminous element and thecontroller,

The present invention has the following beneficial effects when comparedwith the prior art:

Through the magnetic structures which are integrated with the framestructure, after the magnetic sheet is used for a long time, themagnetic structures still can be attached to a magnetic sheet body, andthe problems that the magnetic structures are damaged and fall off areavoided.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, together with the specification, illustrateexemplary embodiments of the present disclosure, and, together with thedescription, serve to explain the principles of the present invention.

FIG. 1 is a front view of a magnetic sheet according to the presentinvention.

FIG. 2 is a top view of a magnetic sheet according to the presentinvention.

FIG. 3 is a perspective view of a magnetic sheet according to thepresent invention.

FIG. 4 is a schematic view of a magnetic structure of a magnetic sheetaccording to the present invention.

FIG. 5 is a front view of a magnetic structure of a magnetic sheetaccording to the present invention.

FIG. 6 is a front view of a plug of a magnetic structure of a magneticsheet according to the present invention.

FIG. 7 is a schematic view of a mushroom pin of a magnetic sheetaccording to the present invention.

FIG. 8 is schematic view of a bigeminy mushroom pin of a magnetic sheetaccording to the present invention.

FIG. 9 is schematic view of a trigeminy mushroom pin of a magnetic sheetaccording to the present invention

FIG. 10 is another schematic view of a trigeminy mushroom pin of amagnetic sheet according to the present invention when observed fromanother angle.

REFERENCE NUMERALS

1. frame structure, 11. outer frame, 111. second groove, 12. innerframe, 13. connecting part, 14. reinforcing rib, 141. first groove, 15.groove, 2. through hole, 3. magnetic structure, 31. steel pipe, 32.magnet, 33, plug, 331. plugging part, 332. sealing part, 333. connectingpart, 4. mushroom pin, 41. single mushroom pin, 42. bigeminy mushroompin, 421. single mushroom pin portion, 422 bigeminy connecting part, 43.trigeminy mushroom pin, 431. single mushroom pin portion, 432. trigeminyconnecting part.

DETAILED DESCRIPTION

The present invention will now be described more fully hereinafter withreference to the accompanying drawings, in which exemplary embodimentsof the invention are shown. This invention may, however, be embodied inmany different forms and should not be construed as limited to theembodiments set forth herein. Rather, these embodiments are provided sothat this disclosure will be thorough and complete, and will fullyconvey the scope of the invention to those skilled in the art. Likereference numerals refer to like elements throughout.

The terminology used herein is for the purpose of describing particularembodiments only and is not intended to be limiting of the invention. Asused herein, the singular forms “a”, “an” and “the” are intended toinclude the plural forms as well, unless the context clearly indicatesotherwise. It will be further understood that the terms “comprises”and/or “comprising,” or “includes” and/or “including” or “has” and/or“having” when used herein, specify the presence of stated features,regions, integers, steps, operations, elements, and/or components, butdo not preclude the presence or addition of one or more other features,regions, integers, steps, operations, elements, components, and/orgroups thereof.

Unless otherwise defined, all terms (including technical and scientificterms) used herein have the same meaning as commonly understood by oneof ordinary skill in the art to which this invention belongs. It will befurther understood that terms, such as those defined in commonly useddictionaries, should be interpreted as having a meaning that isconsistent with their meaning in the context of the relevant art and thepresent disclosure, and will not be interpreted in an idealized oroverly formal sense unless expressly so defined herein.

As used herein, the term “plurality” means a number greater than one.

Hereinafter, certain exemplary embodiments according to the presentdisclosure will be described with reference to the accompanyingdrawings.

FIG. 1 is a front view of a magnetic sheet according to the presentinvention. FIG. 2 is a top view of a magnetic sheet according to thepresent invention. FIG. 3 is a perspective view of a magnetic sheetaccording to the present invention. FIG. 4 is a schematic view of amagnetic structure of a magnetic sheet according to the presentinvention. FIG. 5 is a front view of a magnetic structure of a magneticsheet according to the present invention. FIG. 6 is a front view of aplug of a. magnetic sheet according to the present invention. Withreference to FIGS. 1 to 3, there is shown a preferred embodiment of amagnetic sheet, comprising: a frame structure 1, which is an annularsquare structure in this embodiment; in other embodiments, the framestructure may be rectangular, circular, triangular, diamond,parallelogram, polygon, or other planar shapes; in other embodiments,the frame structure I may be of a tapered shape, a cylindrical shape, acircular-truncated-cone shape, a pyramid shape, or otherthree-dimensional shapes. A plurality of through holes 2 are formed inthe frame structure 1. A plurality of magnetic structures 3 are providedalong a periphery of the frame structure 1. The plurality of magneticstructures 3 allow for a detachable connection among the same type of ordifferent types of frame structures. The frame structure 1 is integrallyformed with the plurality of magnetic structures 3, so as to prevent themagnetic structures 3 from being damaged or falling off when they havebeen in use for a long time.

Furthermore, in a preferred embodiment, each of the plurality ofmagnetic structures 3 comprises: a steel pipe 31, a magnet 32 arrangedin the steel pipe 31 and plugs 33 at both ends of the steel pipe 31. Ina further preferred embodiment, the steel pipe 31 may be a tubularstructure made of other materials, for example, the steel pipe 31 may bereplaced by a plastic pipe. Preferably, the magnet 32 is a cylinder. Themagnetic structure 3 is configured to allow the magnet 32 to freelyrotate in an interior of the steel pipe 31 about an axis, so that themagnetic structures may adaptively adjust a direction of a magnetic polewhen magnetically attached to other magnetic sheets. The steel pipe issealed by the plugs 33, so molding materials for the frame structure 1may not come into contact with the magnet 32 when the frame structure 1is integrally formed by the molding materials, and the fixing of themagnet 32 may be avoided.

Furthermore, in a preferred embodiment, the frame structure 1.comprises: an annular outer frame 11, an annular inner frame 12 disposedin the outer frame 11, and a connecting part 13 for connecting the outerframe 11 and the inner frame 12, wherein the plurality of magneticstructures 3 are arranged in the outer frame 11. Preferably, the outerframe 11 may have a longitudinal section in the shape of circle or inthe shape of ellipse; the inner frame 12 ay have a longitudinal sectionin the shape of circle or in the shape of ellipse; and the connectingpart 13 may have a longitudinal section in the shape of rectangle. Boththe outer frame 11 and the inner frame 12 have a thickness greater thanthat of the connecting part 13, such that an annular groove 15 is formedbetween the outer frame 11 and the inner frame 12. Wherein, a surface ofthe connecting part 13 is formed as a bottom surface of the groove 15,and a side surface of the outer frame 11 and a side surface of the innerframe 12 are formed as side walls of the groove 15.

Furthermore, in a preferred embodiment, the frame structure 1 furthercomprises: a plurality of reinforcing ribs 14 disposed on the connectingpart 13, two ends of each of the plurality of reinforcing ribs 14 areconnected to the outer frame 11 and the inner frame 12, respectively.Specifically, the plurality of reinforcing ribs 14 are disposed in thegroove 15. Preferably, each of the plurality of magnetic structures 3 isprovided with a reinforcing rib 14. In a further preferred embodiment,more than one reinforcing ribs 14 are arranged between the outer frame11 and the inner frame 12, so as to adjust the overall strength of themagnetic sheet. A first groove 141 is formed between two adjacentreinforcing ribs 14. The first groove 141 is formed by a firstprojection on a mold which is at a side surface of the magneticstructure 3. When the magnetic structures 3 are put into the mold, theside surface of the magnetic structure abuts against the firstprojection, such that the magnetic structure 3 may be limited by themold in a radial direction.

Furthermore, in a preferred embodiment, a second groove 111 is formed ona side of the outer frame 11 which is close to the inner frame 12, andtwo ends of each of the plurality of magnetic structures 3 are providedwith two second grooves 111. The second groove 111 is formed by a secondprojection located on the two ends of the magnetic structure 3. When themagnetic structures 3 are put into the mold, the two ends of themagnetic structure 3 abut against the second projection, such that themagnetic structure 3 may be limited by the mold in an axial direction.

A method for integral forming the magnetic sheet will be describedhereinafter:

Step S1, providing an upper die and a lower die, forming a plurality offirst projections and a plurality of second projections on the upper dieand the lower die, respectively, wherein the plurality of firstprojections are located at two ends of a predetermined position of themagnetic structure 3, and the plurality of second projections arelocated at a side surface at a predetermined position of the magneticstructure 3;

Step S2, placing the plurality of magnetic structures 3 in thepredetermined positions for closed-die forging.

In Step S1, the plurality of first projections and the plurality ofsecond projections are fixedly connected to the upper die or the lowerdie.

In Step S2, preferably, the plurality of second projections are ironrods fixed to the upper die or the lower die.

In Step S2, the two ends of the magnetic structure 3 abut against thefirst projections, respectively, and the side surface of the magneticstructure 3 abuts against the second projections, so as to position themagnetic structures 3 during the process of casting.

The above descriptions are only the preferred embodiments of theinvention, not thus limiting the embodiments and scope of the invention.

The present invention also has the following embodiments based on theabove-mentioned embodiments:

In a further embodiment of the present invention, with reference toFIGS. 1 to 6, the plugs 33 are of an integrated structure, the plugs 33comprise the following parts in sequence: a cylindrical plugging part331, plugged into the steel pipe 31; a circular-truncated-cone-shapedsealing part 332 for sealing the steel pipe 31; and a cylindricalconnecting part 33, connected to the frame structure 1. When the framestructure 1 is integrally formed, part of materials of the framestructure 1 are wrapped outside the connecting part 333; furthermore,part of materials of the frame structure 1 may be wrapped around a partof the sealing part 332, such that movement of the magnetic structures 3in a direction of the periphery of the magnetic sheet is limited, andmovement of the magnetic structures 3 in the radial direction of themagnetic sheet is also limited.

In a further embodiment of the present invention, when the framestructure 1 is integrally formed, part of materials of the framestructure 1 may also be wrapped around the side surface of the steelpipe 31, so as to further limit the movement of the magnetic structure 3in the radial direction of the magnetic sheet.

In a further embodiment of the present invention, the plugging part 331has an outer diameter greater than an outer diameter of the connectingpart 333; a larger bottom surface of the sealing part 332 has an outerdiameter greater than the outer diameter of the plugging part 331, and asmaller bottom surface of the sealing part 332 has an outer diameterless than the outer diameter of the connecting part 333.

In a further embodiment of the present invention, the plurality ofthrough holes 2 are formed in a thickness direction of the framestructure 1 and are evenly distributed along a periphery of the framestructure 1. In the embodiment, since the frame structure is of a squareshape, the plurality of through holes 2 are preferably arranged incorners of the frame structure 1; while when the frame structure 1 takesother shapes, the through holes 2 may be arranged as desired.

In a further embodiment of the present invention, when the framestructure 1 is of a triangular shape, both the number of the throughholes 2 and the number of magnetic structures are preferably 3, thethrough holes 2 are arranged in the corners of the frame structure 1,the magnetic structures 3 are arranged on sides of the frame structure1; when the frame structure 1 is of a quadrangular shape, both thenumber of the through holes 2 and the number of the magnetic structuresare preferably 4, the through holes 2 are arranged in the corners of theframe structure 1, the magnetic structures 3 are arranged on the sidesof the frame structure 1; when the frame structure 1 is of a polygonalshape, it is configured in the same manner as described above.

In a further embodiment of the present invention, when the framestructure 1 is of a circular shape, the through holes 2 and the magneticstructures 3 are uniformly and alternatively disposed at the peripheryof the frame structure

In a further embodiment of the present invention, when the framestructure 1 is of a three-dimensional shape, the number of the throughholes 2 is preferably determined by the number of the corners of theframe structure 1, and the number of the magnetic structures 3 ispreferably determined by the number of edges of the frame structure 1.

In a further embodiment of the present invention, when the framestructure 1 is of a three-dimensional structure and has a curvedsurface, the magnetic structures 3 may be arranged on the curvedsurface.

FIG. 7 is a schematic view of a mushroom pin of a magnetic sheetaccording to the present invention. FIG. 8 is schematic view of abigeminy mushroom pin of a magnetic sheet according to the presentinvention. FIG. 9 is schematic view of a trigeminy mushroom pin of amagnetic sheet according to the present invention. FIG. 10 is anotherschematic view of a trigeminy mushroom pin of a magnetic sheet accordingto the present invention when observed from another angle.

In a further embodiment of the present invention, the magnetic sheetfurther comprises: a plurality of mushroom pins that are fitted with theplurality of through holes 2. Two magnetic sheets may be connected witheach other by the mushroom pin. In addition, the mushroom pin may beselectively arranged to form an angle between the two magnetic sheets,and to establish a variety of patterns or structures formed by themagnetic sheets. Combination between different number of mushroom pinsand through holes enables all kinds of connections among the magneticsheets.

In a further embodiment of the present invention, the mushroom pin maybe a single mushroom pin 41, as shown in FIG. 7. The single mushroom pin41 is of a columnar structure in the form of hemisphere at two endsthereof, wherein the two ends of the single mushroom pin 41 has an outerdiameter slightly greater than that of a central portion thereof. Thetwo magnetic sheets may be stacked on each other and fixed relative toeach other in its thickness direction by the single mushroom pin 41.

In a further embodiment of the present invention, the mushroom pin maybe a bigeminy mushroom pin 42, as shown in FIG. 8. The bigeminy mushroompin 42 comprises two single mushroom pin portions 421 and a bigeminyconnecting part 422 for connecting the two single mushroom pin portions421. Preferably, the bigeminy connecting part 422 is made of a flexiblematerial, such that the two single mushroom pin portions 421 on the twosides of the bigeminy connecting part 422 may move with respect to eachother, so as to adapt the various angles between the two magneticsheets. The two magnetic sheets may be arranged and fixed to each otherin a length direction, in a width direction or in a radial direction bythe bigeminy connecting part 42.

In a further embodiment of the present invention, the mushroom pin maybe a trigeminy mushroom pin 43, as shown in FIG. 9 and FIG. 10. Thetrigeminy mushroom pin 43 comprises three single mushroom pin portions431 and a trigeminy connecting part 432 for connecting the three singlemushroom pin portions 431. Preferably, the trigeminy connecting part 432is made of a flexible material, such that the single mushroom pinportions 421 thereon may move with respect to each other, so as to adaptthe various angles between the two magnetic sheets. Preferably, thetrigeminy connecting part 432 is of a cambered surface. Every two of thethree magnetic sheets may be arranged to be perpendicular to each otherand fixed to each other by the trigeminy mushroom pin 43.

In a further embodiment of the present invention, in a preferred case,the three single mushroom pin portions 431 of the trigeminy mushroom pin43 are perpendicular to one another; in other cases, the three singlemushroom pin portions 431 of the trigeminy mushroom pin 43 may be formedat other angles, such that the three magnetic sheets may be formed to bedifferent shapes and fixed to one another.

In a further embodiment of the present invention, the magnetic sheetfurther comprises: a luminous system (not shown in the figures),disposed in the frame structure 1.

In a further embodiment of the present invention, the luminous systemcomprises: a luminous element, a controller for driving the luminouselement, and a power supply for powering the luminous element and thecontroller.

In a further embodiment of the present invention, the luminous elementmay be LED lamp beads, electroluminescent sheets, and light emittingdiodes, and so on.

In a further embodiment of the present invention, the luminous elementmay also be electroluminescent power suspended within the material ofthe frame structure 1.

In a further embodiment of the present invention, the controller has abuilt-in program for controlling the illumination of the luminouselement. Moreover, the controller is used to drive the luminous elementto flash constantly or briefly, to be on or off for a continuous time,and to perform a combination of two thereof.

The above descriptions are only the preferred embodiments of theinvention, not thus limiting the embodiments and scope of the invention.Those skilled in the art should be able to realize that the schemesobtained from the content of specification and drawings of the inventionare within the scope of the invention.

1. A magnetic sheet, comprising: a frame structure, a plurality ofmagnetic structures being arranged on the periphery of the framestructure, the frame structure and the plurality of magnetic structuresbeing integrally formed; wherein each of the plurality of magneticstructures comprises: a steel pipe, a magnet arranged in the steel pipeand plugs at both ends of the steel pipe.
 2. The magnetic sheet of claim1, wherein a plurality of through holes are provided in the framestructure, the frame structure comprises: an annular outer frame, anannular inner frame disposed in the outer frame, and a connecting partfor connecting the outer frame and the inner frame, wherein theplurality of magnetic structures are arranged in the outer frame.
 3. Themagnetic sheet of claim 2, wherein the frame structure furthercomprises: a plurality of reinforcing ribs disposed on the connectingpart, two ends of each of the plurality of reinforcing ribs areconnected to the outer frame and the inner frame, respectively, and afirst groove is formed between two adjacent reinforcing ribs.
 4. Themagnetic sheet of claim 2, wherein a second groove is formed at a sideof the outer frame which is close to the inner frame, and two secondgrooves are formed at two ends of each of the plurality of magneticstructures.
 5. The magnetic sheet of claim 1, wherein the plugs are ofan integrated structure, the plugs comprise the following parts insequence: a cylindrical plugging part, plugged into the steel pipe; acircular-truncated-cone-shaped sealing part for sealing the steel pipe;and a cylindrical connecting part, connected to the frame structure. 6.The magnetic sheet of claim 5, wherein the plugging part has an outerdiameter greater than an outer diameter of the connecting part; a largerbottom surface of the sealing part has an outer diameter greater thanthe outer diameter of the plugging part, and a smaller bottom surface ofthe sealing part has an outer diameter less than the outer diameter ofthe connecting part.
 7. The magnetic sheet of claim 1, wherein theplurality of through holes are formed in a thickness direction of theframe structure and are evenly distributed along a. periphery of theframe structure.
 8. The magnetic sheet of claim 7, further comprising: aplurality of mushroom pins that are fitted with the plurality of throughholes.
 9. The magnetic sheet of claim 1, further comprising: a luminoussystem, disposed in the frame structure.
 10. The magnetic sheet of claim9, wherein the luminous system comprises: a luminous element, acontroller for driving the luminous element, and a power supply forpowering the luminous element and the controller.
 11. The magnetic sheetof claim 3, wherein a second groove is formed at a side of the outerframe which is close to the inner frame, and two second grooves areformed at two ends of each of the plurality of magnetic structures.